201311131 has 8 divisors (see below), whose sum is σ = 232304384. Its totient is φ = 170876520.

The previous prime is 201311113. The next prime is 201311141. The reversal of 201311131 is 131113102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201311131 - 2⁷ = 201311003 is a prime.

It is a super-2 number, since 2×201311131² = 81052342928998322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201311101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138885 + ... + 140326.

It is an arithmetic number, because the mean of its divisors is an integer number (29038048).

Almost surely, 2^201311131 is an apocalyptic number.

201311131 is a deficient number, since it is larger than the sum of its proper divisors (30993253).

201311131 is a wasteful number, since it uses less digits than its factorization.

201311131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279321.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 201311131 is about 14188.4153801614. The cubic root of 201311131 is about 586.0786886608.

Adding to 201311131 its reverse (131113102), we get a palindrome (332424233).

The spelling of 201311131 in words is "two hundred one million, three hundred eleven thousand, one hundred thirty-one".